Knock-off mechanism for looms



Aug. 23, 1932.

W. E. LUNDGREN KNOCK-OFF MECHANIS-M FOR LOOMS Filed Nov. 2, 1951 2Sheets-Sheet l 1|l|T||||||1|lL -TIIII I .il ||||I| T. |l\ |||\|l.| l

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Aug. 23,` 1932. w. E. LUNDGREN KNOCK-OFF MEGHANISM FOR LOOMS 2Sheets-Sheet 2 Filed Nov@ 2. 1951 www `have also shown Patented Aug. 23,1932 UNITED s TAfr WILLIAM ii. LUNDGREN, or

& KivoWLEs Loom worms, MAssAcHUsETTs v Knock-'OrrV ivrncimnisivr .FonLooivrs Appiicatiqn ie'gi November 2, 1931.Y

This-invention relates-to mechanism providedfor stopping a loom on thefailure of a shuttle to properly enter the .shuttley box.

Such mechanism 'operates to stop the lay in i its forward movement andalso to release the shipper and disconnect the driving mechanism. j f

It is the object of my invention to provide improved means foryieldingly resisting and checking the forward mevement ofthe lay. Afurther object of the invention is to provide means by which theyielding resistance to the lay may be conveniently increased ordecreased.

My inventionv further ments and combinations of parts which will behereinafter described and more particularly pointed out in the appendedclaims.

A preferred form of the invention is shown in the drawings, in whichFig. 1 is a plan view of portions of a loom embodying my improvements;

Fig. in th direction of the arrow 2 in Fig. 1;

Fig. 3 is a sectional end elevation, taken along the line 3-3 in Fig. l,and

Fig. 4 is a perspective detached view of my invention.

Referring to the drawings, I haveshown parts of a loom including a layhaving the usual cross shaft l1 and dagger 12, the point of the daggerbeing depressed by the action of the shuttle as relates to' arrangeitenters the shuttle boX. I a portion of a breast-beam 14 secured to aloom side 15, and a portion of a shipper lever 16 engaged by a contactscrew 17 adjustably threaded in the end of a l knock-off member 20.

The member 20 is loosely mounted in a recess or guideway in a stand 22,secured to the under side of the breast-beam 14 by bolts 23. A iiatspring is formed from a plurality of separate spring leaves securedtogether at one end by a clamping bolt 3l.

The member 20 is engaged near the middle of its length by an abutment orupward projeotion 33 on the stand 22, and one end of the spring-clampingbolt 3l is received in a recess 34 in the side of Y thus shortening Yplacing it undei' 2 is a front elevation thereof, looking the abutmentor projec- Serial No; 572,607.Vv tion, thereby i `preventing Y endwiseydisplacement of the spring. Y

The knock-off member 2O is provided with an offset lug or shoulder atits innerend, and the ree end of the spring 30 is positioned to engagethe projection 35 and thus Vprevent. outward endwise movement of themember 20. VA cylindrical roll or fulcrum member 40 is positionedbetween the forward Vface ofthe spring 30 and a cam surface 4l formedonthe inner side of a projecting portion 42 of the stand 22. An adjustingscrew 44 is threaded into the projection 42 and engages the fulcrummember 40. y j As the fulcrummember is forced inward, its point ofengagement with the spring^30 is advanced toward the free end ofthe'spring, and stifening the spring. At the same time the roll 40 isforced rear# ward by the cam surface 4l, thus bending the middleVportion of the spring rearward and of the spring may thus beeffectively increased or decreased by means of theV adjust# ing screw44. j.

The stand 22 is providedl with an opening at its rear side, thuspermitting engage ment of the dagger 12 with the knock-oft' member20.The stand 22 is also provided with an elongated transverse recess oropen-` ing 51,V permitting unobstructed movement of the dagger 12 whenin the loweredinoperative position indicated in dotted lines in Fig. 3.If the shuttle fails to box, the dag# ger 12 will remain in the raisedor operative position indicatedinFig. v8 and as the dagger movesforward, theV pointed end of kthe dagger will be received in a notch orrecess 2 in the rear .face of the knock-o5 mem-` ber 20.

The knock-off member will then'be pushed forward against the resistanceof the spring 30 until the springl overcomes the inertia of the lay andprevents further forward movement of the member 20. At the same time theswinging movement of the member 20 causes the screw 17 to engage andrelease the shipperlever 16 or to otherwise disconnect the drivingmechanism. j YThe interval in which the lay is` brought greater tension.The actionv labor is necessary,

means lto 'move said knock-'offy member, 'a'

means to move .sai leaf spring seated justing mechanism described. The"eo'nstruee" tion of the device is such that no assembling spring 30 andthe f ulcrum member 40 'are' merely dropped into recesses inthestandvlQQ and reqnire no attachment thereto.

Having thu'sfdesc'ribed-' my invention land the advantages thereof, I donot wish to be limited fito the details herein disclosed, otherwisetth'zm-as-,set forth inthe claims, but what -I fclaimisi-s f 1.Ima-"loom, a knock-off member, a stand inV Vwhich said -memberis.movably mounted, means to `move said knock-off member, 'a flat leaf"spring having endportion V"loosely i seated in va recess in'-saidstand, whereby said spring is held from endw'i-se displacement,the.1'oppositefendportionfof 'said spring vengagin'g said lnoc'lvofffrme'mb'er, and'-means engaging said spring between Vits end portionsYand;effective' 'tof vary the lte'nsion 'of spring; j Y

'21% In a'loom,

Vinwlfi-ch said me ber is movably mounted',

multi-leaf springse' ted. at one end in sai stand "and lhaving its saidvlmockbf I'Iifenfiber, and means tofvary the tensionfof :saidvvmultifleaf spring.

' 3. In va loom,

in which said. me ber is movably mounted, means to 'move saidflatleafjspring'seated'atonejend in said stand and having itsfreeendengaging said knock,-

V oifmember, a fulcrum me be'r engaging "saidy nt 'in'termediate'y itsends, and

spring a p o me'an's'toinove s 'ai'd `fulcrum member lengt-h'- wisel'ofsaifd spring; y

'Ilfe "combinationin a loom as set forth@ in claimv 3, in whichf theknock-off Ymember, the sp'rin`g,and the 'loosely thereto. y

In loom, a shoulder `ratene sai-d knock-off member, engaging andyieldingly movement of vsaid knock-od member and also engaginglsaid"shoulder on said member to lp'revent'endwise vdisplacement of saidmein- 6: In albern, inwhichfsaidm'ember is movably mounted, knock-offmember, a l.flat

and having ofi' member, a fulcrum member engaging said. springat'ap'oiiit 'intermediate its ends, said Astand 'havingy a camsurface astheV member 20, the:

said

"a kiioekioii member, estan/dl free end engaged by' a knoeleof'f member,'a' stanfdf l fu'l'crum member are'j` .a'l'l held in sai'd stand butareunatt'ached Y a lmocl-olfiinember having. y end, a stand in which`said Y member ismovably mounted, means to 'move anda fiat leaf 'springy resisting swinging,

a knock-off member, a stand at oner end in [said stand,

and having its free end engaging said knock-V off member, a fulcrummember engaging said spring at a point intermediate its ends, and

Vmeans to move said fulcrum member to bend the intermediate y:portionAof 'said :spring toward -said knock-offmeinbn f 7 In a loom, aknock-off member, a standY Y in which said member is mgvably monnthed,

its free end ng-agmgfsaidlnoclrleaf spring engaged by saidful'c'ruii1`member,andmeans to move said fulcrufm memberalongsaidCamsurface,:therebyV shiftinggthe ful'crum of said spring ybothlongitu-dinalflyand transverselyrelatively'to said f y me

